German submarine U-77 (1940)
Summary of raiding history

Date
Ship
Nationality
Tonnage
Fate
13 June 1941
Tresillian
United Kingdom
4,743
Sunk
22 June 1941
Arakaka
United Kingdom
2,379
Sunk
25 June 1941
Anna Bulgaris
Greece
4,603
Sunk
15 December 1941
SS Empire Barracuda
United Kingdom
4,972
Sunk
12 January 1942
HMS Kimberley
Royal Navy
1,690
Damaged
12 June 1942
HMS Grove
Royal Navy
1,050
Sunk
22 July 1942
Vassiliki *
Greece
140
Sunk
24 July 1942
SV Toufic El Rahman *
Syria
30
Sunk
30 July 1942
Fany *
Egypt
43
Sunk
1 August 1942
St. Simon *
Egypt Egypt
100
Sunk
6 August 1942
Adnan *
Egypt
155
Damaged
6 August 1942
Ezzet *
Egypt
158
Sunk
10 August 1942
Kharouf *
Mandatory Palestine
158
Sunk
16 August 1942
Daniel *
Mandatory Palestine
100
Sunk
20 August 1942
Mahrous *
Syria
18
Sunk
12 November 1942
HMS Stork
Royal Navy
1,190
Damaged
7 February 1943
SS Empire Banner
United Kingdom
6,999
Sunk
7 February 1943
Empire Webster
United Kingdom
7,043
Sunk
16 March 1943
Hadleigh
United Kingdom
5,222
Total loss
16 March 1943
Merchant Prince
United Kingdom
5,229
Damaged

Question: How many tons worth of warships did U-77 damage and declare a total loss?
Answer: German submarine U-77 damaged two warships totalling 2,880 tons and caused one ship of 5,222 GRT to be declared a total loss.